Abstract: Provided are a firmware upgrade method and apparatus, a receiving end device, and a storage medium, The method includes: if an upgrade message for charging firmware is received during wireless charging, controlling a wireless charging receiving end device and a wireless charging transmitting end device to continue the wireless charging according to a preset original data packet of the charging firmware; updating a pre-stored data packet of the charging firmware in a first storage area according to an upgrade data packet of the charging firmware in the upgrade message during the wireless charging, so as to upgrade the charging firmware; and if the charging firmware is successfully upgraded, controlling the wireless charging receiving end device and the wireless charging transmitting end device to carry out the wireless charging according to the upgraded charging firmware in the first storage area.

Abstract: A load resistance value determination method, an apparatus, an electronic device and a storage medium are provided The load resistance value determination method is applied to a controller of a signal transmitting circuit. The signal transmitting circuit further includes a bridge circuit, a load network and a current detection module. The bridge circuit is connected with the load network, the current detection module and the controller, respectively. Firstly, a drive signal is sent to the bridge circuit so as to drive one loop of the signal transmitting circuit to conduct, then average current collected by the current detection module is acquired, and a resistance value of a load resistor of the signal transmitting circuit is determined according to a voltage of the power input end, a duty cycle and the average current.

Abstract: A multi-coil placement method of a wireless charging system is disclosed. The method may include obtaining a width parameter of an effective charging area a and a width parameter of a power transmitter coil b, calculating a ratio of the width parameters a/b, determining a shape, size and number of layers of mesh cells based on the ratio of a/b, determining a layout of the mesh cells, covering a required charging area using the mesh cells based on the determined shape, size, number of layers, and layout, and replacing the mesh cells with the power transmitter coils.

Abstract: A sparse routing coil structure for a magnetic coil in a wireless charging system is disclosed. The sparse routing coil structure may include a magnetic coil routed by turns of a wire and a turn spacing S between adjacent turns of the wire. The turn spacing S may be a space between adjacent turns of the wire, and a turn width is denoted as W. A ratio of W/S may be not larger than 10.

Abstract: A multi-coil placement method of a wireless charging system is disclosed. The method may include obtaining a width parameter of an effective charging area a and a width parameter of a power transmitter coil b, calculating a ratio of the width parameters a/b, determining a shape, size and number of layers of mesh cells based on the ratio of a/b, determining a layout of the mesh cells, covering a required charging area using the mesh cells based on the determined shape, size, number of layers, and layout, and replacing the mesh cells with the power transmitter coils.

Abstract: A sparse routing coil structure for a magnetic coil in a wireless charging system is disclosed. The sparse routing coil structure may include a magnetic coil routed by turns of a wire and a turn spacing S between adjacent turns of the wire. The turn spacing S may be a space between adjacent turns of the wire, and a turn width is denoted as W. A ratio of W/S may be not larger than 10.